Stovepipe-damper



No. 627,!56.` Patented lune 20, |899.A

. D. B. TIBBETTS.

STDVEPIPE DAMPEB.,

Application led Mar. 20, 1899.)

{No Model.)

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rrn STATES i ATENT Prion.

DANIEL TIBBETTS, OF BROCKTON, MASSACHUSETTS.

STOVEPlPE-DAMPER.

SPECIFICATION forming part of Letters Patent No. 627,156, dated June 20,1899.

` Application filed March 2 0, 1 8 9 9.

To @ZZ whom t may concern:

Be it known that I, DANIEL B. TIBBETTs, a citizen of the United Statesof America, residing at Brockton, in the county of Plymouth and State ofMassachusetts, have invented certain new and useful Improvements inStovepipe-Dampers, of which the following is a specification.

My invention relates toA improvements in two-part slidable or adjustabledampers particularly adapted'for stovepipes, though applicable for usewherever such a damper may be found of utility.

The objects of my invention are to improve the construction and relativearrangement of the parts in such a damper, whereby it is adapted toentirely fill the stovepipe and be capable of complete rotation thereinand the relative movement is properly guided, to provide means wherebythe relative adjustment of the two members of the damper shall bemaintained until altered at the will of the operator, and to provideconnecting and stop de-Y vices between the two members of the damper,whereby there shall be at all times a suficient passage for the productsof combustion to permit the escape thereof from the stove through thepipe,`avoiding the accumulation of gases and their escape through thestove into the apartment in which it is situated. i

To accomplish these objects, my invention consists in a stovepipe-damperconstructed and arranged as hereinafter described and claimed, referencebeing made to the accompanying drawings, whereinf Figure 1 is aperspective view of a damper constructed in accordance with myinvention. Fig. 2 is a plan view thereof, and Fig. 3 a cross-sectionalview.

In the said drawings the refel'encemumcral 1 designates the relativelystationary member ofthe damper. It is provided, as shown, with a seriesof open spaces 2, 4separated by cross-bars 3. This memberof'the damperis also provided with the journal or stud 4, projecting outwardly fromits periphery. The stud 4 is so formed upon. the plate 1 that its axisis in true line with the plane of one face of said plate and its baserises from the face of the plate, whereby it serves to form a guiderib 5and also admits of the com plete damper Serial No. 709,713. (No model.)

in, as hereinafter described. Contiguous to the plate 1 said stud 4 isprovided willi a collar 6, which seats against the stovepipe when thedamper is in place, and upon said stud, outside of said collar, ismounted the friction-spring Si At the end opposite the stud 4 theperiphery of plate 1 is cut away, as at 7, to provide a race way fortheaguide-lug formed on the other member of the damper, as will bedescribed. At an angle of about ninety degrees with said stud 4 andraceway 7 the said plate is provided with elongated slots 8, in whichheaded pins 9, projecting from the other or relatively adjustable orslidable member 10 of the damper, are adapted to work. slidable member10 is, like the plate 1, provided with a series of open spaces 11,separated by cross-bars 12, which when in register with the spaces 3 ofthe' plate or member 1 are adapted to aiford a maximum outlet for theproducts of combustion. The shape of the plate 10 is elliptical, asshown, sothat in its different positions of adjustment it `does not passthe periphery'of the plate 1. The

said plate 10 is connected to the plate l by means of the aforesaidheaded pins 9, which pass through the elongated slots'S in 'the lat-1ter, 'and it is guided in its relative move ments with respect to thesaid plate 1 by means of a peripheral guide-opening 13, in which'theguide-rib 5 of the stud 4 fits and along which the walls of theguide-opening are adapted to travel in the sliding or adjusting movementof the member 10. At a point opposite the said guide-opening 18 themember 10 is provided with an offset lug 14, which moves in the raceway7 of the member or plate l. The lug 14 and the raceway 7 cooperate withthe rib 5 and the opening 13 in properly guiding the movement of theplate 10 when being adjusted upon the plate l. Detachably connected withthis offset'lug is an operating journal-,key or ingeipiece 15, which isconveniently connected to said lug by the screwthreaded engagement 16,as shown. The said operating key or finger-piece 15 is connected withsaid lug, so that its axis is in true line with one face of the memberorplate 10 andi in axial line with the axis of the stud 4, whereby theaxis of the completed damper isdis;

The said relatively IOO werey arranged in a line passing through oneonly of said members.

It is of considerable advantagethat thedam per shall fill the entirestovepipe-space. Otherwise when the damper is arranged across the pipethere would be a passage around the damper between its periphery and thestovepipe through which the cooler products of combusl ion would findcomparatively ready exit and tend to the formation of ereosote, whereasby providing a damper constructed according to m y invention the escapeof the somewhat cooler products of combustion around `the .edges ot' thedamper is prevented and they are compelled to mingle with the hotterproducts of combustion and seek their exit through the middle of thedamper and pass together through the central part of the damper by wayof the open spaces 3and 1l.

The elongated slots S and the headed pins f) are so disposed withrespect to their position and dimension in relation to the open spaces 3and ll that when the sliding member l0 is moved to bring its integralbars 12 in register with the open spaces 3 of the plate 1 such movementis accurately limited so that there shall always remain at least a smallspace through which the products of combustion may escape, and thus theaccumulation of gases is prevented and their escape from the stove intothe apartment in which it is located is avoided.

Upon the stud 4 is arranged a coiled or spiral spring S, one end ofwhich seats against thestovepipeP. Said springisconfinedupon the stud bymeans of a washer 17 and a split pin 18, passing through a pin-openingin the said stud in such a manner that when the series of annulargrooves 19, which are adapted to engage the edge of the opening in thestovepipe through which said operating key or finger-piece passes, asseen in Fig. 3. Such engagement of any of the series of grooves 19 withthe edge of the said opening serves to maintain the relatively slidablemember immovable in its position of adjustment until intentionallyaltered. This feature of construction and arrangement is of materialimportance, since the disposition of the relatively movable member l0 tosecure the desired capacity of passage for the products of combustionwill be maintained when the parts are adjusted and a given groove placedin engagement with the edge of the opening in which the operating key or[vinger-piece is lo* cated Without liability of becoming disarranged byjar or shock, that would likely occur Without the provision of suchmeans.

Having thus described my invention, what I claim is- 1. A damperconsisting of a perforated plate formed with a journal-stud projectingfrom the periphery thereof and the axis of which is in line with theface ofy the plate, the base of said stud rising from the face of theplate and constituting a guide-rib, said plate provided in its peripheryat a point opposite the j ournal-stud with a raceway; and a relativelymovable perforated plate resting upon the first-named plate, and havingpin-and-slot connection therewith, said movable plate provided with aguide-recess itting the guiderib of the journal -stud of the iirstfnamedplate, and provided also with a lug moving in the raceway of thefirst-named plate, and an operating finger-piece carried by said lug sothat the axis of said inger-piece is in line with the face of the plateto which it is secured, said linger-piece having a series ofannulargrooves formed thereon and adapted to engage the stovepipe for lockingsaid plate in its relative position of adjustment, substantially asdescribed.

2. A damper consisting of a perforated plate formed with a journal-studprojecting from the periphery thereof and the axis of which is in linewith the face of the plate, the base of said stud rising from the faceof the plate and constituting a guide-rib, said stud having a collar tobear against the stovepipe and a spring mounted thereon outside of saidcollar, said plate provided at a point opposite the j ournal-stud with araceway in its periphery; and a relatively movable perforated plateresting upon the first-named plate and having pin-and-slot connectiontherewith, said movable plate provided with a guide-recess itting theguide-rib of the journalstud of the firstnamed plate and provided alsowith a lug moving in the race of the first-named plate, and an operatingfinger-piece carried by said lug so that the axis of said finger-pieceis in line with the face of the plate to which it is secured, saidfinger-piece having a series o'f annular grooves formed thereon andadapted to engage the stovepipe for locking said plate in its relativeposition of adjustment, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

DANIEL B. 'IIBBETTS.

Witnesses:

ARTHUR L. RICH, RICHARD W. NUTTER.

IOO

